an eclectic melding of pre-Peterine Russian architecture and elements of Byzantine architecture. 1820 Monorail The so-called "Road on Pillars" near Moscow, with horse-drawn carriages, built by Ivan Elmanov. 1825 Zhostovo painting 1828 Electromagnetic telegraph by Pavel Schilling 1829 Industrial production process of sunflower oil 1829 Three bolt diving equipment by E. K. Gauzen 1830s 1832 Data recording equipment Semen Korsakov was reputedly the first to use the punched cards in informatics for information storage and search. Korsakov announced his new method and machines in September 1832, and rather than seeking patents offered the machines for public use. 1833 Lenz's law by Heinrich Lenz 1835 Centrifugal fan by Alexander Sablukov 1838 Electrotyping by Boris Jacobi 1839 Electric boat by Boris Jacobi 1839 Galvanoplastic sculpture by Boris Jacobi and Heinrich Lenz 1840s 1847 Field anesthesia by Nikolay Pirogov 1848 Modern oil well by Vasily Semyonov 1850s 1850s Neo-Byzantine architecture in the Russian Empire emerged in the 1850s and became an officially endorsed preferred architectural style for church construction during the reign of Alexander II of Russia (1855–1881), replacing the Russo-Byzantine style of Konstantin Thon. 1851 Struve Geodetic Arc by Friedrich Georg Wilhelm von Struve 1851 Russian Railway Troops 1854 Modern field surgery By Nikolay Pirogov 1854 Stereo camera 1857-1861 Theory of chemical structure By Alexander Butlerov, one of the principal creators of the theory of chemical structure, the first to incorporate double bonds into structural formulas, the discoverer of Hexamine and the discoverer of the Formose reaction. 1857 Radiator A radiator is a heat exchanger used to transfer thermal energy from one medium to another for the purpose of cooling or heating. The first historical application of radiator was in central heating systems. The heating radiator was invented by Franz San Galli, a Polish-born Russian businessman living in St. Petersburg, between 1855 and 1857. 1858 Saint Isaac's Cathedral Saint Isaac's Cathedral is the largest Russian Orthodox cathedral in St. Petersburg. It was the tallest Eastern Orthodox church upon its completion (subsequently surpassed only by the Cathedral of Christ the Saviour). It is dedicated to Saint Isaac of Dalmatia, a patron saint of Peter the Great who had been born on the feast day of that saint. Designed by Auguste de Montferrand, the cathedral is a masterpiece of the late classicism, built between 1818 and 1858. Multiple innovations were used during construction, such as the giant cast iron dome, special frameworks to erect